Steam-engine reversing-gear.



APPLICATION FILED NOV- 3. 1915.

Patented Feb. 6,1917.

3 SHEETS-SHEET 1.

252m m 71. T W V P 1'. R. SNYDER. STEAM ENGINE REVERSING GEAR.

APPLICATION FILED NOV- 3.1915.

Patented Feb. 6,1917.

mam

J. R. SNYDER.

STEAM ENGINE REVERSING GEAR.

APPLICATION FILED NOV. 3, 1515. mmw Patented Feb. 6,191?

3 SHEETS-SHEET 3 m/m w WI T NfSSES JACOB RUSH SNYDER, OF PITTSBURGH, PENNSYLVANIA, ASSIGNQR T PERCY E.

DONNER, OF PITTSBURGH; PENNSYLVANIA.

STEAM-ENGINE REVERSING-GEAR.

Specification of Letters Patent.

Patented Feb. 6, 1917.

Application filed November 3, 1915i iSeria1N o.'59,404

- to move Whenever motive. fluid is admitted thereto, but is positively locked at all other times, so as to not only prevent accidental movement of the valve gear after actuation but also prevent any kickback to the engiand showing the valve mechanism re spec-' tively in normal released and lock applying position, in lock applying position, and in cylinder apphcation and lock. releasing position; Fig. 14.- is a plan view of the second or upper rotary disk showing a modification; Figs. 15, 16 and 17 are diagrammatic views showing the different positions of the valve mechanism with this modification, and Fig. 18 is a sectional view on the line 1818, Fig. 10. I 1

In the drawings, 1 represents arcversing cylinder in which works the piston 2 whose piston rod3 is; connected to the reversing or reach rod 4, whichin turn is connected to the usual reversing link mechanism of the engine,-not shown. In neutral position-the piston 2 stands midway of the length of the 4 cylinder 1, and'when it is movedin one dineer or-o'perator when setting the valve gearreversing handle, and also one which isso. .d

arranged as to prevent the valve gear I from being moved; farther than intended, and-- to provide means for manually operating the reversing gear should the powermechanism become inoperative from any cau'se.

The invention comprises the construction andarrangement of ,scribed and claimed.

Inf-the accompanying drawings, Figure 1 is a vertical sectional view through the actu ating cylinder and the locking device for the reach rod andshowing the valve mechanism through the valve mechanism on an enlarged scale; Fig. 5 1s 'a horlzontal sectional view on the line 55, Fig. 2'; Fig. .6 is a plan view of the reach rod locking device; Fig. 7 is a section thereof on the line 77, Fig. 6;

Figs. 8, 9 and 10 are plan views respectively of'the seat, the first or lower rotary disk, and the second or upper rotary disk of the valve mechanism; Figs. 9 and, -10 are in 5 disks shown in Figs. 9 and 10; Figs. 11, 12

verted plan views respectively of the rotary and 13 are plan views looking down on the second or upper rotary disk and showing in..

- dotted lines the various ports, passages and cavities of both'disks and of the valve seat parts hereinafter derection, the link mechanism is moved to, say,

piston2 is moved inthe opposite direction, the link mechanism is moved to'drive the en 'gine backwardly. These movements of the piston are secured by admitting and exhausting .fluid pressure alternately to and fi'om the opposite ends of the cylinder." A. looking device is provided for preventing movement of the piston and rods connected thereto until the actuating means has been moved fully to the desired position, to prevent the fluid pressure admitted to the cylinder from moving the actuating cylinder and injuring the engineer, and also looking said rods at all times except when fluid pressure is admitted to 'said cylinder to move the reversing link mechanism, in order to prevent accidental movement of these parts after being set..

The rod locking device shown is in the form of a clampembracing the reach rod and comprises a. stationary member 5 having pivotally connected thereto at 6 the gripping jaw 7 which is provided with an arm or extension 8 arranged to be actuated by a pro jection 9 on a movable abutment i-nathe form of a diaphragm 10 mounted in the small cylinder 11 and arranged to have m otivei fluid supplied to one face of said movable abutment in order to drive the projection 9 against the arm 8 and cause the jaw 7 to,

grip the reach rod 4.

A special form of valve and actuating means therefor is provided for admitting pressure to and exhausting it from the opposite ends of the cylinder 1 and also adrive the engine forwardly, while, when the mitting motive fluid to and exhausting it from the cylinder 11 of'thelocking,device. This valve mechanism comprises a member 12 which is secured by means of nut 13 and key r13 to the stationary segment 14, which is provided with a circular hub'15'on which rod 4 andengaging a pin or anti-friction rollers 19 on said rod, so that the movement of the reachrod by the power cylinder 1 imparts movement to the arm 16, and vice versa.

Secured to the member 12 is a valve casing 21 closed at its outer end by the head 22 whose inner face forms a seat 23 of the valve. Working on this seat is the first or lower disk 24 whose opposite face in turn handle 17, so that the angular movement of the handle 17 carries with it the first or forms a seat for the top or second rotary disk 25. The'rotary disks are held to the seat and against each other by a compression spring 26. The disk 24 isprovided with a hollow stem which projects through the head 22 andhas secured to its'outer end an arm 28 which is secured to the actuating lower rotary disk 24. The inner or upper rotary disk 25 is also provided with a hollow stem which extends throughthe hollow Stem of disk 24 and has secured to its outer end an arm30 which has a slot and pin connection 31 with a bar 32 slidably mountled on the handle 17. To the lower end of the bar 32 is adjustably connected a plunger- 33, such as by having the latter threaded on to the bar, as shown; The lower end of this plunger is square and engages a similar opening in a nut 34 having its periphery threaded and engaging the threaded interior of casing 35 secured to and forming apart of the arm 28 ofhandle 17 so that it at all times swings with said handle. In casing 35 are washers 36 and 36 engaging respectively with shoulder 37 in the casing and the nut 34, and arranged in the downward and upward movements of the bar 32 to be engaged respectively by shoulders 38 and 38 on said bar. Between the washers 36 is a compression spring 39, which acts to resist movement of the bar 32 either downwardly or upwardly, and therefore serves to move the bar back to neutral positionirrespective of the direction in which it has been moved. By rotating the plunger 33, and with it the nut 34, the tension of the spring 39 can be adjusted. The upper end of bar 32 has a slot,-and pin connection 40 with a member 41 provided with a pair of hand grips 42 and 42 lying respectively on opposite sides of the grip 43 of the handle17, and which member 41 lS'PlVOtGd to the handle at 44,

so that by moving either one of the grips 42 or 42 toward the handle. 43, the engineer can either elevate or depress the bar 32, as desired, depending upon the direction in which he wishes to move the main handle '17. The handle 17 is held against accidental or unintentional movement in either direction by means of a pair of locking plungers 45 and 45 which are sl-idably mounted in ing-plungers 45, 45*, and which wedges are adapted,- whenthe bar 32 moves, to engage the overhanging portions 48 and retract the'plungers 45, 45 to disengage the same from the arm 16. When, for instance,

the hand grip 42 is grasped by the engineer together with grip 43, the bar 32' is depressed, 'thus bringing projection 49 underneathlocking plunger .45 and retracting the latter so as to permit movement of the handle 17 toward the right (viewing Figs. 1 and 2), whereas, when the engineer grasps the hand grip 42 together with grip 43, the bar 32is lifted and causes the inclined projcc'tion 49 to pass underneath the overhang- .ing portion of plunger 45 thus retracting the same from engagement with arm 16, and

permitting movement of"handle 17 toward the left, (viewing Figs. 1 and 2).

The handle 17 is further locked against movement by means of a vertically slidable locking dog 50 provided at its lower end with a series of long teeth arranged to engage the long teeth 51 on the stationary segment 14. The dog 50 is provided at its upper end with a cross'slot 52 in which moves a roller 53 carried by a downward extension 54 on the handle grip member41, so that no matter in which direction this member 41 is rotated on its fulcrum 44 the locking dog 50 will be lifted and be disengaged from the rack bar 51 and permit the movement of handle 17 in either direction. Mounted on handle 17 is a small cam 55, said'cam being provided with a stem 56 extending through the handle 17 and receiving on its outer end'a spring washer and nut 57, so that said cam, while free to rotate, is frictionally held so that it does not rotate freely or idly. On its lower face this cam is provided with a notch 58 arranged to be normally engaged by a finger 59 on the upper end of the arm 16. The upper face of the cam normally projects above the bottoms of the teeth 51 of segment 14, and

is provided with'a number of'notches which the teeth on the lower end of locking, dog 50 can enter-so as to permit said locking dog" to fall fully downward.

The valve casing 21 is provided with an inlet 60 for motive fluid to the space above the rotary disks in said casi'ng, and the valve seat 23 is provided with three ports, to wit, port 61' connected by pipe 62 to one end of the cylinder l, port 63 connected by pipe 64. to the opposite end of cylinder 1, and port -65 connected by pipe 66 to port 67 of the lock actuating; cylinder 11.

The lower rotary disks 24 is provided with three ports, marked 68, 69 and 70 respectively, which extend entirely through the disk, and which communicate with grooves on the "lower face of said :disk, which grooves are of. such length that communication between the ports in the valve seat and the ports through said disk is-not broken by the rotation of the disk 24 to the extent permitted bythe actuating connections.

In order to reduce friction the lowerface ofthe top disk 25 is cut away in part so as to'leave raised portions or projections which alonecontact. with the valve seat and control the ports in the lower disk. As shown,

said disk 25'has an arc-shaped raised portion or projection '71provided' with a pair of circular ports 72 each connected by a ,radial passage 73 with a hollow 74 in the stemof said valve, which hollow 74: forms the exhaust, saidprojection 71 being intercepted by a ra'dialgroove 82; and a'pair of arc-shaped raised portions or'projections 75 and 76 provided respectively with arcshaped cavities 77 and 78 connected by -ra-- dial passages 79 with the hollow 74 of the fstem of said valve, and which'p'rojections 75 and 76 are intercepted respectively by radial grooves 80 and 81.

. Normally the handle 17 is in the position shown in Figs. l and 2, being held between I the locking plungers 15l5 on each side thereof, and with the looking dog 50 engaging the teeth 51 of segment 14: and also the.

notches in the upper face of cam 55. In this position the piston 2 ismid-way of the length of the cylinder land the valve mechanism is in the position shown in Fig. 1-1' 'in ivhich the ports 68,69 and 70 of the first rotaryv disk registerwith the'ports 61, 63 and in the valve seat, cavities 77 and 78 of the second disk register respectively with ports 68 G0 projection 71 permits motive fluid to pass to port and thence to port 65, connected and 69 and .thus connect both ends of .the cylinder 1 through radial passages 79. with the exhaust passage 74; while. the radial groove 82 intercepting the raised portion of to the cylinder 11 of the reach rod locking device. Consequently in this position both ends of the'power-cylinder 1 are exhausted,

but the reach rodis locked so that accidental movement of thereversing link mechanism cannot occur.

To shift the valve gear, the engineer moves one of the hand grips 42 or 12, de-' pending upon the direction in which he wishes to shift the handle 17 When he wishes to shift said handle toward the right,

Fig. 1, he grasps the grips 4:2 and 43, thus depressing the bar. 32, and retracting looking plunger 45, whereas, if he wishes to shift the handle 17 to the left, he grasps the grips 12 and"43, thus lifting the bar 32 and r I retracting the locking plunger-45 In the former case the valve gear will be shifted to drive the'engme say forward, and in the latter case to reverse the engine. Assuming that the engineer wishes to drive the engine forwardly, he will grasp the hand gr1ps 42 and 43, rotating the member %1 about its fulcrum i l and depressing bar 32, thereby causing the inclined p pjection i9 to retract the locking plunger 45, and permit movement of the handle 17 -to the right. At the same time the roller 53 working in the cross groove 52of the dog 50 lifts "the latter to disengage it from both the cam 55 and the stationary rack teeth 51. a. The downward movement of bar32, through the arm ,31 also rotates the top disk 25 to the position shown in Fig. 12, but without moving the bottom disk. This movement produces no change whatsoever in the relation ofcavity 78 and ports 69 and 68, so that the left hand end of cylinder 1 is still open to exhaust,- but results in blanking port 68 by the solid part of projection on the topmost disk, while port 70 is in; this position also uncovered (the projection 71 having passed entirely beyond the same), so that motive fluid is still flowing to the reach rod locking cylinder 11. As aconsequence, the

any changein their relative relations. The arc-shaped slots of the lower face of the disk 24 are of such length that such movement of the disk through the extreme distance through .which handle 17 can 'move the same will not break connection with the ports 61 63and 65 ,of the valve seat, so that during this movement the relations shown in Fig 12 are in no manner disturbed. the handle 17 is moved it carries with cam 55, and inasmuch as the arm 16 its finger 59 are stationary, the engagement of sponding upward movementof the bar 32,- and rotating the upper disk 25 backwardly about one-half of the distance of its'original *movement when the bar 32 'was lowered.

This brings the valves to the position shown in Fig. 13, in which the ports 68,- 69 and 70 p are still in register with the ports 61, 63

, to exhaust, but radial groove 80 through and 65 in the valve seat, while port 72 of the upper rotary disk registers with port 70, thus permitting the reach rod cylinder 11 to exhaust'through ports 65, 70, 72 and radial passages -7 3 to exhaust passage 74; cavity 78 still registers with port.69, so that the left hand end of cylinder 1 is still open the projection 75 now uncovers port 68, thus permitting motive fluid to flow tothe right hand end of cylinder land movethe piston 2 and reach rod 4 to shift the reversing link mechanism. The movement of reach rod 4 through the connection 19 and arm 16 now swings-'the'arm 16 in the same direction in which the handle 17 was moved. This move ment will continue until the finger 59 .on the arm 16 engages notch 58 in cam 55 and rotates the latter contra-clockwise until the notches in its upper surface are brought into line with the teeth on the locking dog 50, whereupon the latterimmediately drops down into said notches, permitting the bar 32 to rotate the top rotary disk 25 back- .wardly-to its original position relative to the disk 24, thus reestablishing'the same relations as shown in Fig. 11, the only difference being that both disks have been rotated around contra-clockwise, but without dis-- uturbing their relative relations from that shown in Fig. 11 or breaking the connection between the arcshaped slots on the lower face of disk 24 and the ports in the valve seat. In this position the top disk again establishes communication-between port 68 and the exhaust port 74, so that both ends of cylinder 1 are again exhausted; while at the-same timethe radial groove 82 again permits motive fluid to flow to port 70, and thence toport and to the reach rod looking cylinder 11.

When it is intended to reverse the engine,

' the handle 17 is merely moved in the opposite direction from that described, to wit, toward the left, and the valve disks are then both rotated in the opposite directions from 55 those described, but produce exactlyithe same results as described, except'only that in this case the motive fluid is admitted to the left hand end of cylinder 1, and causes movementof the reach rod in the opposite direction from that described.

The valve mechanism described is therefore so organized that the reach rod. is

locked at all times (including the time of movement of handle 17 )except during the interval of time immediately after the handle has reached its final position and the locking dog 50 has dropped halfway down,

at which time motive fiuid is'admitted to one or the other end of cylinder 1 and'the reach rod locking cylinder 11 is-exhausted so asto permit movement of the reach rod and link mechanism. As soon, however, as the reach rod has moved to the desired position and the finger 59 has turned the cam 55' sozas to allow the 'lo cking dogto fall down fully,

motive fluid is exhausted from the, cylinder 1, and the reach rod is again locked,,and remamslocked until the handle 17 is again shifted. Consequently the reversing link mechanism can not be accidentally jarred out of the position to which set, and at the same time the reach rod is locked so that there can be no kickback during-the time that the engineer is moving the handle 17.

The valve, mechanism described insures the movement .of the'valve gear positively and to thedesired extent and requires'no attention-of the engineer other than to unlock the handle ,17 by either lifting or depressingthe bar 32, and then move the handle to the desired position, all of the other operations taking place entirely automatically. The engineer cannot move the handle 17 "except in the direction of the particular locking plunger 45 or 45 which has been retracted. I

In case the power mechanism becomes inoperative from any cause, it is only necessary to disconnect the bar 32 from handle 17, by removing pin 40, and then shift the .reversing gears by handle 17, which can be done because the upperend of arm 16, is.

held between the plungers 45, 45, on handle 17 and must'therefore move with'said handle, while its extension 16 connects directly to the reach rod 4.

Figsg14, 15, 16 and 17 show a modification of the valve mechanism, in which the portions of the projections 75 and 76 which are cut off by the radial grooves 80 and 81 have been entirely omitted. The only effect of this modification is that when the bar32- is either lifted or depressed and the handle 17 free to be moved, the port 68 (or the port 69, depending on the directionin which'the handle 17 is moved) is uncovered, as shown in Fig. 16, and is not blanked as shown in Fig. 12 in the preferred modification. As a -result motive fluid immediately flows to the cylinder 1', instead of being prevented from iao flowing thereto until the handle has been moved fully to the desired position and released so as to permit the dog 50 todrop 1 part Way down, as in the preferred modifica-i -t1on. Inasmuch, however, as the reach rod rod,'and valve mechanismcontrolling the supply and exhaust of motive fluid toand from the tWo sides of said motor and to and from said locking device and arranged while setting said valve mechanism to the desired position to maintain fluidpressure in said locking device and exhaust it from said motor, and when said valve mechanism has been set tojthe desired position to exhaust the motive fluid from said locking device and admit motive fluid to one side of said 'motor'. e

2. 'In valve reversing mechanism, the combination of a reversing fluid pressure motor,

a reversing r'od actuated thereby, a fluid pressure actuated locking device forsaid rod, valve mechanism controlling the supply andexhaust ofmotive fluid to and from the I two sides of said motor andtoand from said locking device and arranged to'admit motive fluid to the locking device when set ting the valve mechanism to'the desired po- -sition,' to exhaust motive-fluid from said locking device and simultaneously admit motive .fluid to one side of the motor when the valve mechanism has been set in the desired position, and means actuated by the travel of the reversing rod for causing said valve mechanism. when the rod has traveled the required distance to exhaust said motor and simultaneously admit motive fluid to said locking device.-

3. In valve-reversing mechanism, the combination of a reversing fluid pressure motor,

a reversing rod actuated thereby, a fluid pressure actuated locking device for said' rod, an actuating handle, 'valve mechanism controlling the supply and exhaust ofmotive fluid to and from the two sides of said motor and to and from said locking device and arranged to admit motive fluid to said locking device upon movement of said handle, to release motive fluid from said lockmg device and simultaneously admit motive fluid to the motor to move said rod upon movement of the handle to the desired position, and atter'movement of said rod to the. o desired extent to again admit motive fluid tothe locking device and simultaneously ex haust it from said motor.

i. In valve reversing mechanism, the combination of a reversing fluid pressure motor,

g a reversing rod actuated thereby, an actuating handle, a fluid pressure actuated looking device for Silld'I'OCl, valve mechanism controlling the supply and exhaust of motive fluid to and from the two sides of said motor and to and-from said,locking de- .vice.and arranged upon movement of said handle to admit motive fluid to the locking device, and when the handle has been moved to thedesired position'to release motive fluid from said locking device and simulta- ,neously admit motivev fluid to the motor to move the rod, and means actuated'by the travel of said reversing rod for causing said valve mechanism when the rod has traveled the required distance to exhaust said motor and simultaneously admit motive fluid to said locking device.' a 5. In valve reversing mechanism, the combination of a reversing fluid pressure motor, a reversing rod actuated thereby, an actuat ing handle, a-locking member for said handle, a fluid "pressure actuated locking de- -vice for-said rod, and valve mechanism con trolling the supply and exhaust of motive fluid to and from thetwo sides of said motor andto and from said locking device and arranged vhen the handle locking member 1s actuated to release the handle to admit motive fluid to the rod locking device, upon movement of said handle to the desired position to exhaust motive fluid from the rod loclging device and simultaneously admit, it

' to the actuating motor, and upon movement of the handle locking member to again lock,

the handle to exhaust motive-fluid from the motor and simultaneously admit it to the rodlocking device.

6. In valve reversing mechanism, the combination of a reversing fluid pressure motor,

- a reversing rod actuated thereby, an actuating handle, a locking member for said actuating handle, a fluid pressure actuated looking device for said rod, valve mechanism controlling the supply and exhaust of motive fluid to and from the two sides of said motorand to and from said rod locking dev1ce and arranged upon movement of said handle locking member to release said han dle to admit motive fluid to said rod locking device, and upon movement of the handle-to the desired position to exhaust motive 'fluid from the rodlocking device and admit motive fluid to one side of the motor, and 7 means actuated by the travel of said reversing rod When it has traveled to the required distance to permit the handle looking member to again lock the handle and simultaneously move the valve mechanism to exhaust motive fluid from the motor and simultaneously admit motive fluid to the rod locking device,

7. In valve reversing mechanism, the combination of a reversing fluid pressure motor, a reversing rod actuated thereby, a fluid pressure actuated locking device for said rod, valve mechanism controlling the supply and' exhaust of motive fluid to and from the two sides of said motor and to and from the said locking device, an actuating handle for said valve mechanism, a lock for said handle, means arranged'upon the releasing of said handle lock to simultaneously actuate said valve mechanism and admit motive fluid to the rod locking device, and means when the handle has been moved to the desired position to permit the partial restoration of said handle lock and thereby move the valve mechanism to exhaust motive fluid from the locking device and simultaneously admit motive fluid'to the motor,

8. In valve reversing mechanism, the combination of a reversing fluid pressure motor, a reversing rod actuated thereby,v a fluid pressure actuated locking device for said rod, valve mechanism controlling the supply andexha'ust of motive fluid to and from the .two "sides of said motor and to and from the said locking device, an actuating handle for said ya'lve mechanism, a lock for said handle, means arranged upon the releasing of said handle lock to simultaneously actuate said valve mechanism and admit motive fluid to; the rod locking device, means when mit the full restoration of the handle lockply and exhaust of motive fluid to and from the two sides of said motor and to and from the said locking device, an actuating handle for said valve mechanism, a locking member fo'rsaid handle, and'connections therefrom to said valve mechanism so arranged that when said handle locking member locks the handle inposition motive fluid is admitted to the rod locking device and exhausted from the motor, upon movement of said handle locking member to release said handle the valve mechanism maintains motive fluid to said rod locking device, upon movement of the handle to the desired position the valve mechanism is moved to exhaust motive fluid from the rod locking device and admit it to the motor, and. upon.

movement of the handle locking member to re-lock said handle motive fluid is released from said motor and re-admitted to said supply and exhaust of motive fluid to and from the two sides of said motor and to and from the said locking device, an actuating handle for said valve mechanism, a locking member for said handle, connections there-- from to said valve mechanism so arranged that when saidhandle locking member locks said handle motive fluidis admitted to said. rod locking device and exhausted from said motor, upon movement of said handle locking device to release said handle said valve mechanism maintains motive fluid in said rod locking device, upon movement of said mit motive fluid to said motor, and means actuated by the travel of the reversing rod when it has traveled to the required dis tance for permitting movement of the handle locking member to again lock the handle and thereby move the valve mechanism to exhaust motive fluid from the motor and admit motive fluid to the rod locking device.

11. In valve reversing mechanism, the

combination of a reversing fluid pressure,

motor, a reversing rod actuated thereby, a fluid pressure'actuated locking device for said rod, valve mechanism controlling the supply and exhaust of motivev fluid to and from the two sides of said motor and to and from the said'locking device, an actuating handle for said valve mechanism, a locking member for said handle, connections from said locking member'to the valve mechanism and arranged when the handle locking member locks the handle in position to admit motive fluid to the rod locking device and exhaust it from said motor, upon movement of said handle'locking member to unlock the handleto move the valve mechanism to maintain fluid. pressure in the rod locking device, means actuated by the movement of said handle to prevent ful'l'restoration of said handle locking member, whereupon upon movement of the handleto the desired position the partial restoration of the handle locking member causes movement of the. valve mechanism to exhaust fluid pressure from the rod locking device and admit fluid fluid from the motor. 10'

12. In valve reversing mechanism, the comhinatlon of a reversing fluid pressure motor, a reversing rod actuated thereby, a

fluid pressure actuated locking device for said rod, valve mechanism controlling the supply and exhaust of motive fluid to and from the tWo sides of said motor andto and from the said locking device, an actuating handle for said valve mechanism, a locking dog for said handle, connections from the same to said valve mechanism, a member carried by said handle and controlling the position-of said locking dog, and means movable with the reversing rod and engaging said dog controlling means and arranged upon movement of the handle to move-said latter means to prevent full restoration of said locking dog, and upon movement of the reversing rod to the required-distance, to again engage said means and move the same to permit full restoration of said lockmg dog.

13. In valve reversing mechanism, the combination of a reversing fluid pressure" motor, a reversing rod actuated thereby, a fluid pressure actuated locking device for said rod, valve mechanism controlling the supply and exhaust of motive fluid to and from the two sides of said motor and to and from the said locking device, an actuating handle for said valve mechanism, connections between" the handle and said reversing rod arranged to be disconnected when the valve mechanism is operated, and detachable connections between the handle and the valve mechanism.

14. In valve reversing mechanism, the combination of a reversing fluid pressure motor, a reversing rod actuated thereby, a fluid pressure actuated locking device for said rod, valve mechanism controlling the supply and exhaust of motive fluid to and from the two sides of said motor and to and from the said locking device, an actuating handle forsaid valve mechanism, an arm connected to said reversing rod, a lock arranged to normally connect said arm to said handle, connections between said handle and said valve mechanism arranged Whenmoved to actuate said valve mechanism to release said lock and disconnect said arm from said handle, and a separable means in the conmotion between said handle and the valve mechanism.

' In testimony whereof, I have hereunto set my hand.

JACOBv RUSH SNYDER.

Witnesses GLENN H. LEREsoHE, C. B. SANDERSON. 

